There is no way to correct it, just study its measurement principle.
The electronic sphygmomanometer is not accurate because the pressure sensor is inaccurate. The error of domestic pressure sensors can be controlled within 1mmHg. It is because the oscillometric measurement principle is flawed.
Sphygmomanometers mainly include auscultation method sphygmomanometers and oscillometric method sphygmomanometers.
Auscultation method is divided into manual auscultation method and automatic auscultation method. Mercury sphygmomanometer (pressure gauge) and spring gauge sphygmomanometer (pressure gauge) are the early manual auscultation method sphygmomanometers. Today’s manual auscultation method Methods include digital sphygmomanometer, light column sphygmomanometer, light sphygmomanometer, liquid crystal sphygmomanometer, etc.; the auscultation method is technically difficult to automate. Automation of the Korotkoff auscultation method will be the main direction for the development of sphygmomanometers. The automatic auscultation method sphygmomanometer will make blood pressure measurement more convenient and accurate.
The oscillometric method is also called the oscillation method. Simply put, it is to obtain the oscillation wave generated during the deflation process, and convert it to obtain the blood pressure value through a certain algorithm. The vast majority of electronic blood pressure monitors are designed using the oscillometric principle. Electronic blood pressure monitors are divided into upper arm type, wrist type, and finger type.
When choosing a sphygmomanometer, you must choose a sphygmomanometer designed based on the auscultation method principle. Mercury sphygmomanometers are not environmentally friendly and inconvenient to use. Oscillometric sphygmomanometers have large measurement errors and may lead to misdiagnosis. The auscultation method automatic sphygmomanometer is the best choice. It automatically completes the process of manual auscultation by doctors and digitizes the Korotkoff auscultation method. It combines the accuracy of mercury and the advantages of electronic sphygmomanometers, overcoming the shortcomings of both. It has become a reality for medical institutions and families to accurately measure blood pressure.
Accurate measurement of blood pressure is a prerequisite for preventing and treating hypertension.